-Engine Oil Function The oil that circulates through an engine plays an important part in engine life. Not only does it lubricate the fast moving parts of the engine to reduce friction and wear, but ...

Shell's Dan Arcy examining engine components following teardown testing conducted two years ago as part of the company's PC-11 development process. (Photo by Sean Kilcarr/Fleet Owner) Dan Arcy, the ...

The American Petroleum Institute (API) will allow oils to be marketed with CK-4 or FA-4 “in the donut” starting on December 1, 2016. (Photo by Aaron Marsh/Fleet Owner) With the first licensing date ...

We earn commissions from purchases you make using links in our articles. Learn more. Save time and money by changing your own oil. See the best conventional motor oils here. Shopping for engine oil ...

Selecting the right engine oil can be challenging. Between the various different brands and the confusing numbers and oil classifications, you may feel overwhelmed while staring at hundreds of bottles ...

After 2010, with the advent of selective catalytic reduction (SCR), engine stresses and many of our concerns about maintenance actually eased. But growth in the world’s economy, in traffic volumes in ...

Oil is a vital component for engines of all types. Not only is it responsible for providing lubrication to numerous moving interior parts, but it also helps prevent friction and the development of ...

With less than a year to go before licensing is scheduled to begin, a much clearer portrait of the new engine oil category that will enter the market in conjunction with new federal emissions ...

The first oils certified for use in exhaust-gas-recirculation (EGR)-equipped diesels will be available in June 2002, according to the American Society for Testing and Materials’ Heavy-Duty Engine Oil ...

If you've ever performed your own oil change at home or even just popped the hood to check your oil level, you may have noticed the mix of numbers and letters emblazoned on your engine oil fill cap or ...